Back in Descartes' time, they had an excuse to believe the soul was in the pineal gland: they didn't know what it was for, it was connected to the brain, and they desperately wanted to proove that there was such a thing as a soul. Now there's no such mystery left.

Oh, and what about the people who have their pineal gland removed because of a cancer? Do they turn into soulless beasts?

I had to look up what the pineal gland was. I learned something new today. Thanks, CSTDT!
On another note, I have to ask my fluoride conspiracist friend about its effects on the pineal gland. It might set him off on a rant or something. :D